Software Engineer III - B2 Object Storage

About Backblaze

Backblaze is the object storage leader in the open cloud movement, fueling customer success with cloud storage built purposefully to unlock budgets, unburden administrators, and unleash innovators. Together with our partners, we’re helping customers break free from the restrictive, overpriced legacy solutions that hold them back, and blaze forward with the full power of the open cloud in their hands.

What You'll Do:

You will work on B2 APIs and subsystems that allow our customers and integrations to upload objects, manage object lifecycles, track usage, and interact with our billing and storage systems. You will help build new features, improve the scalability of our systems, and build internal observability tooling.

Responsibilities:

• Design, implement, and maintain B2 and S3-compatible APIs to ensure correctness, performance, and backward compatibility for a large base of external customers and integrations.
• Participate in technical design discussions and contribute to clear design documents
• Instrument services, develop metrics, define meaningful SLIs/SLOs, and drive reliability improvements.
• Actively participate in on-call rotation to help determine incident root causes and identify follow-up remediation items

The Right Fit:

• 4+ years of server-side Java programming experience
• Experience writing software for distributed systems, including design, implementation, testing, and rollout
• Communicates proactively in a remote environment by keeping the team informed, surfacing blockers early, and moving work forward
• Familiarity with AI-assisted development tools (e.g., Gemini, Cursor, Claude Code)

Bonus points for:

• Cassandra and Vitess experience
• Agile and scrum experience